<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <titl>文本格式化</title>
</head>
<b>This text is bold</b>

<br />

<strong>This text is strong</strong>

<br />

<big>This text is big</big>

<br />

<em>This text is emphasized</em>

<br />

<i>This text is italic</i>

<br />

<small>This text is small</small>

<br />

This text contains
<sub>subscript</sub>

<br />

This text contains
<sup>superscript</sup>

</body>


</html>